Angle cock device



P 26, 1939- A. NEVEU 2,173,949

ANGLE COCK DEVICE Filed Jan. 11, 19 38 2 Sheets-Sheet 1 y W1 E 25 I?///Q 26 INVENTOR I4 3%; NEVEU SepLIZG, 1939. A. NEVEU 2,173,949

ANGLE COCK DEVICE Filed Jan. 11, 1958 2 Sheets-Sheet 2 Fig.6

BY%'W v ATTORNEY Patented Sept. 26, 1939 Anselme N eveu, Livry- Gargan,

PATENT OFFICE CK DEVICE France, assignor,

by mesne assignments, to The Westinghouse Air Brake Company, poration ofPennsylva Application January 11,

In France March 30, 1937 4 Claims.

This invention relates to cock devices and more particularly to the typehaving a spherical, segment like valve face, and the principal object ofthe invention is to provide an improved device of this type which isleak-proof in both directions of flow and which will remain leak-prooffor longer than usual periods of time.

According to this object the end trunnions of the valve, are providedwith a certain amount of clearance or lost motion in their respectivebearings in order to allow the valve to be displaced in a planeincluding the axis of the bearings and that of the seat which the valveis adapted to seal against, or in other words, in a direction to allowthe valve to move towards the seat. By this construction, when the valveis subject to fluid pressure urging it in the direction toward the seat.it can move against said seat and thereby obtain a leak-proof seal. Theseat itself is preferably resilient so that when fluid pressure acts onthe valve in the opposite direction the seat can be forced into sealingengagement with the valve so as to prevent leakage.

Other objects and advantages will be apparent from the following moredetailed description of the invention.

In the accompanying drawings: Fig. l is a longitudinal sectional view ofa cock device embodying one form of the invention and showing the partsthereof in the position assumed when subject to a difierentialof fluidpressure acting in one direction; Fig. 2 is a view similar to Fig. 1,but showing the parts in the position assumed when subject to adifferential of fluid pressures acting in the reverse direction; Figs. 3and 4 are sectional views taken on the lines 3--3 and 4-4 in Figs. 1 and2, respectively; Fig. 5 is a sectional view taken on the line 5-5 inFig. 1; Fig. 6 is a sectional view similar to Fig. 1 but embodying amodified form of the invention, and Fig. 7 is a sectional view taken onthe line 1-1 of Fig. 6.

The improved cock device shown in the drawings for the purpose ofillustrating an application of the invention is preferably of the typeknown as angle cock devices particularly adapted for use at the end ofrailway vehicles for controlling communication between the brake pipe onthe vehicle and the usual flexible hose which is adapted to be connectedto a corresponding hose on a coupled vehicle, whereby communication isadapted to be established between the brake pipe on the one vehicle andthat on-the coupled vehicle.

As shown in the drawings, the improved angle cock device comprises acasing I having a valve Wilmer-ding, Pa., a cornia 1938, Serial No.184,360

chamber 2 which is connected at one side to a passage-way 3 adapted tobe connected to the usual flexible hose (not shown) at the end of thevehicle, while at the opposite side said chamber is connected to apassage-way 4 adapted to be connected to the brake pipe (not shown) onthe vehicle. The passage-way 4 is preferably provided in a cap member 5which is secured to the casing I in any suitable manner, such as bybolts 5A, and interposed between the inner end of said cap member and anoppositely arranged shoulder on the casing is the annular flange portionof a ring type, resilient gasket or valve seat 8 having a centralpassage 9 connected to the passage-way 4.

The gasket 8 is provided on the right hand side with an annular valveseat I I, while at the opposite side there is provided an annularclearance space l0 between said gasket and an annular shoulder 6provided on the cap member 5 inside the annular portion thereof whichsecures the gasket in place. This space H] is open to passageway 4 inorder that fluid pressure from said passage-way may act on the gasketfor urging it in a direction toward the right hand, while the shoulder 6is provided for limiting deflection of the gasket in a direction towardthe left hand.

The seat II is provided on the gasket 8 for sealing engagement with thespherical, segment like face l2 of a rotatablev valve [3 provided inchamber 2. The valve i3 is journalled in the casing preferably onoppositely disposed coaxial trunnions or pivot members l4 and arrangedat right angles to the axis of the gasket 8. The trunnion I4 isjournalled in a circular bore I 6 provided in a cap member I! secured tothe easing l preferably by screw-threaded engagement, While the trunnionI5 is journalled in a circular bore I8 which is provided in an actuatingmember I9 slidably mounted in a suitable bore in a bushing which issecured in the casing opposite to and in axial alignment with the capmember l1.

The actuating member I9 is provided within chamber 2 with an annularflange 2| which is provided with a ring gasket 22 adapted to sealagainst an annular seat rib 23 provided on the inner end of the bushing20 for preventing leakage of fluid under pressure from chamber 2 pastsaid member to the atmosphere. A spring 24 is disposed in bore 18 withone end engaging the bottom of said bore and the other end engaging theend of trunnion l5 for holding the valve l2 in engagement with the innerend of cap member l1 and for also holding the actuating member 50 isthus movable inthe bore I8 inthe'direction IS in the position'in whichthe gasket 22 seals against the seat rib'23 as shown in the drawings.

The area of the portion of the annular flange 22 between the actuatingmember I8 and seat rib 23 is connected through a groove 25 in saidmember and a passage 28 extending through the bushing 28 and casing I tothe atmosphere in order to release any fluid under pressure which mayleak past said seat rib.

A finger 21 extends into chamber 2 from the inner face of the flangeportion 2I of the actuating member I8 and is disposed in a slot 28provided in an extended portion of the valve I3 for providing a drivingor turning connection between said actuating member and valve, saidflnger being provided with a certain amount of lost motion in said slotto permit a certain movement of the valve relative to the valve seat II. A handie (not shown) is adapted to be mounted on the outer end 29 ofthe actuating member for turning said member and thereby the valve I3 toits different positions.

In the drawings, the valve I3 is shown in the position closingcommunication between the passage-ways 3 and 4, but by means of thehandle (not shown) and through the medium of the actuating member I9said valve is adapted to be turned from this closed position in aclockwise direction, as viewed in Fig. 5, through an angle ofsubstantially 90 to an open position in which the valve is disengagedfrom the gasket 8 and communication is established between thepassage-ways 3 and 4.

According to the invention the valve trunnions I4 and I5 are providedwith a certain amount of looseness or lost motion in the respectivebores I8 and I8 in order to permit a certain limited movement of thevalve relative to the body I in a directiontoward the seat II on thegasket 8 when the valve is in closed position, so as to insure aleak-proof seal between said seat and the face I2 of the valve.

This is accomplished, as shown in Fig. 3 of the drawings, by cuttingaway the side of the trunnion I4 adjacent the valve face I2 to a surface38 having substantially the same radius as that of the bore I8, therebyobtaining a section of some what oblong shape the greater diameter ofwhich is slightly-less than thatuof bore I8 while the shorter diameteris also less. The trunnion I4 of its shorter diameter a distanceexceeding the width of the space .III at the back-of the gasket 8, butmovement of the trunnion in the bore in the direction of the greaterdiameter is held to a The face-of the trunnion I4 oppositegthe. surface38 is formed coaxial with the valve and at substantially the same radiusas that of bore I8 thereby providing a good bearing between this face ofthe trunnion and the side wall of said bore for'supporting the valve I3while being turned. I

The opposite trunnion I5 which extends into the bore I8 in the actuatingmember I8 is preferably frusto-conical in shape having a diametermeasured at the open end of said bore, with the actuating member I8 inthe position shown in the drawings, which is sumciently less than thediameter of the bore that there is slight clearance space between saidtrunnion and the actuating member I8 when the valve I3 and thereby thegasket 8 are moved to the positionshown in Fig. 2 of the drawings, inwhich the gasket 8 engages shoulder 6 on the cap member 5, as will behereinafter explained. Due to the frusto-conical shape of the trunnionI5 and the looseness thereof in bore I8 it will be evident that slightoscillatory movement of the valve I3 is. permitted for the purpose ofobtaining adjustment of the face I2 of the valve to the bearing face IIof the gasket 8.

In operation the valve I3 is adapted turned to its opened and closedpositions through the medium of the actuating member I9, as abovedescribed. 'In the open position of the valve I3 fluid under pressure isadapted to flow in either direction between passage-ways 3 and 4 as willbe evident, but in the closed position of said valve it is adapted toprevent flow of fluid either in the direction from passage-way 3 topassage-way 4 or from passage-way 4 to passage-way 3.

Let it be assumed that the valve I3 is in closed position and that thepassage-way 3 is vented while the passage-way 4 is supplied with fluidunder pressure. The pressure of fluid in ,passage-way 4 thus actsthrough the opening 9 in gasket 8 on the face I2 of the valve I3 andurges said valve to the position shown in Fig. 1 in which the trunnionI4 bears against the cap member I'I while the trunnion I5 bears againstthe actuating member I8. The valve is thus held against movement towardthe right hand, as viewed in Fig. 1 cf the drawings, and at the sametime fluid under pressure in passage 4 and thereby in the recess III atthe back of the gasket 8 deflects or urges said gasket towards and intosealing contact with the valve face I2 so as to prevent leakage pastsaid valve. By thus deflecting gasket 8 into engagement with the face I2of the valve I3 it will be evident that a leakproof seal is obtained toprevent leakage of fluid under pressure from passage-way 4. The width ofthe clearance space III need only be sufficient to insure access offluid pressure from the passage-way 4 to the left hand face of thegasket 8 so that it will be deflected into engagement with the valve I3,as above described.

Now let it be assumed that the passage-way 4 is vented and thatpassage-way 3 is supplied with fluid under pressure. The fluid pressurein passage-way 3 thus acts on the valve I3 urging it toward the lefthand and due to the looseness of the trunnions I4 and I5 in therespective bores I6 and I8, said valve is moved relative to the body Iagainst the gasket 8. As the gasket-8 is thus subjected to pressurefrom-the valve I3 it yields and deflects into engagement with shoulder 6on the cap 5 following which the fluid pressure in passage-way 3 forcessaid valve against said gasket thereby effecting a leak-proof seal'therethe valve I3 just described is shown'in Fig. 2 of the-drawings,audit will be noted that in this position the trunnions I4 and I5 maystill be slightly loose in their respective bores in the directionlongitudinally of the cock, and since the trunnion I5 is slightly, loosein the bore I8 in a direction transversely of the cock, as well aslongitudinally it will be evident that the face I2 of the plug I3,

valve to turn in a counterclockwise direction on the member I8 until atight seal is obtained with the gasket 8.

with for preventing leakage of fluid .under,pres-' 'sure from the.passage-way '3. The position of The modified form of the invention shownin Figs. 6 and 7 differs from that above described in that the valve I3is provided with an elongated opening 30 in place of the trunnion I4,this opening being disposed so that its greater diameter extendslongitudinally of the cock when the valve I3 is in the closed position,shown in the drawings. A cap- 3|- is used in place of the cap I! and isprovided at its inner end with a circular trunnion 32 of substantiallythe same diameter as the shorter diameter of opening 30 and disposed insaid opening. The upper end of the valve I3 is adapted to bear againstthe left hand side of the trunnion 32 when said valve is in closedposition and acting to prevent flow of fluid from passage-way 4 topassage-way 3. In acting to prevent the flow of fluid in the oppositedirection however, the valve 13 is adapted to follow up deflection ofthe gasket 8 into engagement with the shoulder 6 in the same manner asdescribed in connection with the construction shown in Fig. 1, forthereby insuring a leak-proof seal with said gasket.

From the above description of the invention it will be noted that due tothe slight looseness or lost motion provided in the valve bearing at oneend of the valve in a direction longitudinally of the cock device, inaddition to the slight looseness provided in the other valve bearing indirections both longitudinally and transversely of said device, the facel2 or the valve will move against and adjust itself to the gasket 8 soas to insure a leak-proof seal therewith even after wear of the partsand possible deformation of the gasket. The upper end of the valve I3is, however, held against movement in a direction transversely of thevalve, when closed, in order to facilitate turning of the valve from oneposition to another, and also to avoid undue distortion of the gasket asthe valve is turned thereon, and still further this insures betteralignment between the face II of the valve and-the gasket, as the valveis turned from the open to the closed position, so that the leading edgeof the valve will not catch on the gasket and possibly cause damagethereto.

While two illustrative embodiments of the invention have been describedin detail, it is not the intention to limit its scope to theseembodiments or otherwise than by the terms of the appended claims.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. A cock device comprising a casing having a.

valve seat and a fluid conducting communication extending through saidseat, a. valve loosely mounted in said casing and adapted to cooperatewith said seat in a closed position ofthe valve for closing saidcommunication and rotatable from said closed position to an openposition for opening said communication, said valve having a pair ofoppositely disposed, loose journal connections with said casing designedto permit movement of said valve relative to said casing in a straightline toward said seat when said valve is in closed position, and one ofsaid journal connections being also designed to permit limited movementof the adjacent end of said valve in a direction transversely of saidvalve seat.- a

2. A cock device comprising a casing having a valve seat and a fluidconducting communication extending through said seat, a valve looselymounted in said casing and adapted to cooperate with said seat in aclosed position of the valve for closing said communication androtatable from said closed position to an open position for openingthrough which communication opening said communication, said valvehaving a pair of oppositely disposed coaxial pivotal connections withsaid casing, one of said connections comprising a journal elementdisposed in a cylindrical bearing, said element having a substantiallysemi-circular bearingface opposite the seating face of said valve formedcoaxial with said valve at substantially the same radius as that of thesaid bearing, said element having opposite said bearing face, asubstantially semicircular face formed at said radius but from a centerdisposed between the axis ofsaid valve and said bearing face therebyproviding for movement of said element in said bore in a directiontoward said seat when said valve is in closed position, the otherconnection between said valve and casing comprising a circular journalelement disposed in a bearing of greater diameter than the journalelement to render the adjacent end of said valve adjustable relative tosaid casing in all directions radially of the-axis of the journalconnection with said casing.

3. A cock device comprising a casing having a I valve seat and a fluidconducting communica:

'tion extending'through said seat, a valve loosely mounted in saidcasing and adapted to cooperate with said seat in a closed position ofthe valve for closing said communication and rotatable from said closedposition to an open position for opening said communication, anactuating element mounted to rotate in said casing and having a bore,said valve having two coaxial journal connections, one with said elementand one with said casing, the journal connection with said elementcomprising a trunnion projecting from one side of said valve into saidbore and being tapered to permit movement of said trunnion relative tosaid elementin all directions at right angles to the axis of saidelement, and the journal connection between said valve and casingcomprising a journal element and bearing therefor in which there isprovided clearance space to permit movement of said valve relative tosaid casing in the direction of said seat only, whensaid valve is inclosed position.

4. A cock device comprising a casing having a chamberand a passagewayopen to said chamber, a flexible ring element secured around itsperiphery in said casing and having a central is adapted to beestablished between said passageway and chamber, a valve loosely mountedin said chamber and having a face adapted to engage said element aroundthe periphery of said opening in a closed position of said valve forclosing said communication, said valve being movable from said closedposition to an open position for opening said communication, said valvebeing'journalled in said casing with clearance space between the journaland bearing to permit movement of saidvalve relative to said casing inthe direction of said element when said valve is in closed position, theface of said element opposite the valve engaging surface thereof beingopen to and thereby subject to the pressure of fluid in said passagewayfor flexing said element into sealing contact with said valve in theclosed position of said valve, and said casing having a shoulder adaptedto be engaged by said face of said element for limiting deflection ofsaid element in the direction away irom said chamber,

, and for thereby supporting said valve when subject to pressure urgingsaid valve in the direction of said element.

' ANSELME NEVEU.

